Get all groups for a session
GET/api/sessions/:sessionId/groups
Get all groups for a session
Request
Responses
- 200
- 400
- 404
- 409
- 503
List of groups the session is a member of
Session not ready
Session not found
The session is not connected — an engine exists for it but is not ready: disconnected, reconnecting, or still initializing, so the request never reached WhatsApp. Wait for ready and retry. A session that was never started answers 400 instead, and the session lifecycle routes answer 409 for a conflicting state rather than this. One window answers this while the session still reads ready: WhatsApp Web periodically reloads its own page and the engine re-injects into it — for those few seconds the answer is a 409 naming the reload; retry shortly.
WhatsApp did not answer the group-list query. Deliberately not reported as an empty list — the engine returns the same empty value for "you are in no groups", and a caller cannot tell those apart from the body.